31P-NMR studies of the oral pathogen Streptococcus mutans: observation of lipoteichoic acid.
Biochim Biophys Acta
; 845(2): 242-8, 1985 May 30.
Article
em En
| MEDLINE
| ID: mdl-3995090
ABSTRACT
We have used 31P-nuclear magnetic resonance spectroscopy to identify phosphorus-containing compounds in whole cells of two serotype c strains of the oral pathogen Streptococcus mutans. The major resonance, centered at 0 ppm in whole cells, was attributed to lipoteichoic acid on the basis of its chemical shift, insensitivity to pH changes, cellular localization and a comparison with spectra obtained with purified lipoteichoic acid from S. mutans. The linewidths of resonances observed for intact cells and purified lipoteichoic acid were moderately narrowed by increasing the ionic strength, and substantially broadened in the presence of the lectin concanavalin A. Experiments with purified lipoteichoic acid suggest that this compound in whole cells is complexed with divalent cations such as Mg2+. Intracellular pools of other phosphorus-containing metabolites were found to be low when compared to the lipoteichoic acid concentration in both starved and glycolyzing cells.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ácidos Fosfatídicos
/
Streptococcus mutans
/
Ácidos Teicoicos
/
Lipopolissacarídeos
Idioma:
En
Revista:
Biochim Biophys Acta
Ano de publicação:
1985
Tipo de documento:
Article